### What changes were proposed in this pull request?
Rename FileWriter to PartitionLocationDataWriter, add storageManager, delete fileinfo, and flusher in the constructor.
FileInfo(userIdentifier,partitionSplitEnabled,fileMeta)
– NonMemoryFileInfo(streams,filePath,storageType,bytesFlushed)
– MemoryFileInfo(length,buffer)
FileMeta
– reduceFileMeta(chunkOffsets,sorted)
– mapFileMeta(bufferSize,numSubPartitions)
### Why are the changes needed?
1. To make concepts more clear.
2. To support memory storage and HDFS slot management.
### Does this PR introduce _any_ user-facing change?
NO.
### How was this patch tested?
GA and cluster test with worker kill.
Closes#2130 from FMX/b1133.
Lead-authored-by: mingji <fengmingxiao.fmx@alibaba-inc.com>
Co-authored-by: Keyong Zhou <zky.zhoukeyong@alibaba-inc.com>
Signed-off-by: zky.zhoukeyong <zky.zhoukeyong@alibaba-inc.com>
7be05b430b